Mikle schmaltz



(No Model.)

M. SCHMALTZ. PROPELLER WHEEL. No. 512,751. PatentedVJaJn. 16, 1894..

NITED l STATES PATENT OFFICE'.

MIKLE scHMALTZ,foF vBAYl CITY, MICHIGAN, AssIGNoR oF ONELHALF To WILLIAMJ. wANLEss, or sAMI; PLACE.

PRCPELLER-WHEEL.

SPECIFICATION forming part of Letters Patent N o. 512,751, dated Jannary16, 1894.

Application inea July zo, 1893. serial No. 481.047. N0 model.)

To aZ Z whom t may concern.-

Be 1t known that I, MIKLE SCHMALTZ, a citizen of the United States,residing at Bay City, 1n thecounty of Bay and State of Michigan, haveInvented a new and useful Propeller- Wheel, of which the following is. aspecifica-y tion.

My invention relates to propellerwheels,

and has for its object to provide simple, inexpensive, and serviceableconstruction of parts and means for connecting the same, wherebysuchparts may be adjusted with facility and locked against displacement;and, furthermore, to provide a sectional wheel capable of utlllzlng thefull amount of the water through which it passes.

Further objects and advantages of this inventlon will appearin thefollowing description ,and the novel features thereof will beparticularly pointed out in the appended claims.

In the drawings: Figure 1 is an elevation of apropeller wheel embodyingmy'invention. Fig. 2 1s aside view of the same, partly broken away. Fig.3 is a plan View of the hub. Fig. 4 1s a detail view, in perspective, ofone of the blades.

Similar numerals of reference indicate correspondlng parts in all thefigures of the drawlngs. t

1 designates the hub, the surface of which is provided with a series ofspirally-arranged channels 2, which are formed in the similarlyarrangedintegral ribs or enlargements 3. The material between such ribs orenlargements 1s cut away to lighten the structure.

i The channels or grooves 2 are dove-tailed in cross-section to receivethe dove-tailed webs 4 upon the Inner ends of the blades 5, such bladesbeing provided at their outer ends with projections 6, to engageapertures or perforatIons 7, 1n the rim 8. To assemble the parts of thewheel they blades are fitted at their inner ends in the channels of thehub and are then dlsposed within thc rim with their termInal projections6in registration with the apertures of the same, after which taperedwedges 9 are inserted in the channels 2, between the fioors of thelatter'and the adjacent extremities of the blades, and .are driven 5ohome to extend. said blades, whereby their dove-tailed surfaces arecramped snugly in the correspondingly-shaped portions of the channelsand the terminal projections are locked rmly in the apertures of therim. Such projections are then headed upon the outer surface'of the rim.

It is obvious that the fioors of the channels in the hub'are straightand do not conform to the curvature of the outer surface of the hub, andthat the inner ends of the blades are straight to conform to the ioorsof the challnels, whereby the bearing of the wedges or keys upon thecontiguous opposing surfaces of the channels and blades is firm and eventhroughout. The outer terminals of the blades may be slightly convexedto conform to the curvature of the inner surface of the rim; and

in manufacturing the blades, the projections with which said outer endsare provided should vbe made slightly greater in length than thethickness of the rim to provide material for forming the heads upon theouter surface of the rim.

The facility with which the parts of the wheel may be assembled will bereadily understood from the foregoing description, and in means of theconstruction provided an even ltension of the rim may be attained by theproper adjustment of the wedges or keys.

Various changes in thel form, proportion,

and the minor details of construction may be resorted to withoutdeparting from the prinlciple or sacrificing any* of the advantages ofthis invention. t

claim is#- addition thereto it should be noted that byv 1. In apropeller Wheel, the combination with the rim, of blades bearing attheir outer extremities against the inner surface of the rim andprovided with terminal projections extending through apertures in thesame,'a hub provided with channels in which theinner ends of said bladesare fitted, and means for adjusting the blades relatively to the hub,

substantially as specified.

2. In a propeller wheel,'the' combination with a rim, of a hub providedwith dove-tailed channels, blades provided at their inner eX- tremitieswith dove-tailed'webs fitting in Said t S5 Having described theinvention, what I` 1 channels, and tapered keys tted in the channelsbetween the floors thereof and the contiguous ends of s the blades,substantially as specified.

3. In a propeller wheel, the combination of a hub provided withspirally-disposed ribs or enlargements which are partly cutaway to formchannels having straight floors, blades fitting at their inner ends insaid channels, a rim provided with spaced apertures or perforations,projections integral with the cuter ends of the blades fitting in saidapertures or perforations and headed upon the outer surface thereof, andtapered Wedgesor keys fitting in the channels between the inner ends ofthe blades andthe oors of the channels. substantially as specified.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two Witnesses.

MIKLE SCHMALTZ.

"Witnesses:

DEVERE HALLL I-I. A. BENoE.

